function closeall() {
    var divs = document.getElementsByTagName('div')
    var elements = divs.length
    for(var i = 0;i < elements;i++){
       var divStyle = divs.item(i)
       divStyle.style.display = 'none';
    }
    return;
}
function showOne(showme) {
    closeall()
    var element = document.getElementById(showme)
    element.style.display = 'block'
    return;
}